Describe the bug

Hi, I have found a memory leak caused by tooltip directive.

Steps to reproduce the bug

1. Create buttons with tooltip directive
2. Delete buttons from DOM
3. Take snapshot - detached HtmlInputElement and others remain in memory

Bug is probably in

Versions

Libraries:

• BootstrapVue: 2.0.4
• Vue: 2.6.10

Demo link

CodeSandbox

I would appreciate if you could take a look, as we heavily use tooltips and popovers in our production app.

Thank you.